129445101 has 8 divisors (see below), whose sum is σ = 191770560. Its totient is φ = 86296716.

The previous prime is 129445079. The next prime is 129445117. The reversal of 129445101 is 101544921.

It is not a de Polignac number, because 129445101 - 2¹⁵ = 129412333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4794263 = 129445101 / (1 + 2 + 9 + 4 + 4 + 5 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129445171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2397105 + ... + 2397158.

It is an arithmetic number, because the mean of its divisors is an integer number (23971320).

Almost surely, 2^129445101 is an apocalyptic number.

It is an amenable number.

129445101 is a deficient number, since it is larger than the sum of its proper divisors (62325459).

129445101 is an equidigital number, since it uses as much as digits as its factorization.

129445101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794272 (or 4794266 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 129445101 is about 11377.3942974655. The cubic root of 129445101 is about 505.8579032534.

The spelling of 129445101 in words is "one hundred twenty-nine million, four hundred forty-five thousand, one hundred one".